Eductor



Aug, 14, 1945.

' P; BERMAN4 EDUGTOR 'Fi1edJan- -24, 1944 ATTORNEY Patented Aug. 14,1945 EDUoToR p Pinna Berman, New York, N. Y. .Appiicatiinanuary 24,1944, semina. 519,555`

` 2 claims. (o1. roei-26o) n'lh-is invention relates to stream-lined`eductors forpumping water containing sand, .mudcor sludge and whichwill eiiiciently utilize the energy of theincomingstream fof Vwaterunder Apressure to f evacuate `or educt the sludge.

fobject of this invention is rto, provide `an eductor ihaiving a conicalnozzle Vfor drive water positioned in equally circumscribed relation'in`a hollow 4body for driven water with .the'lower portion of the 4nozzle`projecting below the lower wall of the ,hollow *body :and with theinner oontour `of thenozzle forming `a direct continuation`ofthescontour `of the drive water inlet to said hollow bod-y, wherebyturbulence is `avoided and the full pressureof fthe drive water ismaintained up to the point of entrance to the nozzle and without loss`of energy to rand through the nozzle.

Another object'of this .invention Vis to provide .a :pressure waterinlet rand nozzle `carrier vwhich may vbe selectively adjusted 'tovarious angular :positionsrelative to the pumplcasingand to provideaseparable .pipe coupling secured intermediate` the pressure water 'inletand Apressure water to permit removal of thepre'ssure water *in-let and:nozzle carrier `'witliout .disturbing the set positions -of theeductor:and piping, and so 'that a single .eductor having this rangularlyadjustable inlet .and nozzle carrier will :bea'daptedjto take theuplacefof quite ya number `of eductor units having c'ixed angularpositions of `the pressure water inlet, and simultaneously to providefull and funobstructed flow `of the pressure water vwithout turbulence,in all of the selective positions. y

With the :above and `other fobjec'ts invi'ew, 'the invention will-behereinafter AAlrnore particularly described, and the :combination 'andarrangement of parts 'will `beshownin the accompanying draw- `supplyline Iwhich may be disconnected at will ing and pointed out the claimswhich lform i part Aof this specification.

:Reference will now be :had tothe drawing, wherein like :numerals `of.reference 'designate f corresponding parts throughout the severalviews, i'n'which:

Figure 1 -is -a Avertical cross-'sectional View of thewater eductorembodying theinvention.

4Figure `2 is a cross-sectional view, Vtakenv `as `on line 2--2 in-Figure 1. l i

. the lillustrated-embodimentoi the invention the numeral I0 indicates astream-lined `eductor comprising a tubular central portion `or body H. Anozzle hl2 is positionedaxiallyfof the said tubularbodylfl. I t l`Venturi or compound Ltub'e rI3 is 'threadably secured at the ,outletlend` of ythe .tubular body `'Igl and in axial alinement therewith. TheVenturi tube i3` has aconverging `lower portion I4, a vdiverging upperportion l5, a throat I6 fandga cylindrical tubular portion l1.

The 'outlet of the nozzle l 2 terminates in spaced relation from thethroat t6 of the Venturi tube. `i3, 1eaving an annularzgap. The nozzleI`2:isof

conical form 4so as to increase the velocity @ofthe drive water passingtherethrough. l i

` `Asrshown in Figure 1, it will be seen that .the outlet edge of the.nozzle I2 .is substantiallyof knife-edged thickness which serves `toAmaintain the annular space at themeteringentranceand y permits mergingof the drive and drivenfstrea'ms of water without turbulence.

The tubular portion L7. `forms a metering or i mixing chamber in whichthe driven water meets the `drive water `from the nozzle. Thefchamber l1has fan upper metering plane I8 and 'lailower metering ,plane i9. `Asshown in Figure 1, it jwill l be seen that the mixingchamber is `ofuniform` cross-section throughout its length.

The metering junction of these streams rtakes place adjacent thelowermeteringplane It).` `For `maximum efficiency the meeting junctionof .the

drive and driven'streams should bepositioned at a minimum distance abovethe lowermetering planeof .the metering part ofthe neck, Aor mixingchamber. v i

The :body H of the water eductor `t0 has an integral inlet 20 `which is`axially oise't yfrom fthe axis of the nozzle l2. Below the body Il isa. curved elbow-shaped inlet 2l for the `drive water. As shown inthedrawing, the body Il provides a very large storage chamber 22. The lowerYelbowshaped portion preceding the nozzle is so curved for easy flow asto `overcome nearlyfall the loss of elbow friction. The inner contour oftheinoz'- zle forms a direct'continuation of the contour of theelbow-shaped `pressure water inlet, 1so-as to produce a minimum ofresistance to flow. `As shown in Figure 1, it will be seen that the.upper elevation of the nozzle is :positioned considerably above thelargestcross-sectionof the hollow body.

I rprovide the elbow-shaped Yinlet 2| with a circular flange 25'and asimilar circularflange 26 `is provided on the lower face of the bodyI'I.

Studs 2l' passing through clearance holesinthe flange 25 and threaded intheflange -26 `provide means -Whereby the elbow-shaped inlet 21 may i bedetachably secured to the body l l.

of the hollow body The inner surface of the flange 25 has a thread 30into which the nozzle may be threadably secured.

The bolts 21 are equally spaced around the circular flanges 25 and 26 topermit adjustment of the pressure water inlet 2| in selective angularpositions in relation to the body while maintaining axial alinement ofthe nozzle I2 with the axis of the mixing chamber under allangularadjustments. i

As sliownein Figure l,I a separable pipe coupling 32, wellknown in theart as a union, is secured -thatvarious changesandmodications can bemade therein without ,departing from the spirit to the inlet 2| for thedrive water and to thegy. 1;

pressure water supply line 3|. pipe coupling 32 when unthreaded permits*the nuts 33 on,the studs 21 to be removed-and the ;,tionsza gasket 34 isinserted betweenthe flange y)25;,and theapertured lower face 26 of thecasing and assures a tight junction between theinlet 2| and the casing 1In operationI the drive water'passes throughy the -nozzle l2 and causesthe liquid discharged therethrough to be under increased high velocity.

l.The nozzle l2 projects directly into .the entrained stream so that.the general direction of the len- '.trained stream is not changed. Theentrained :liquid is given an impulse by the eductor jet in .thedirection in which it is ilowing.

, Theconicalnozzle of the eductor imparts an `impulse effect to the1liquid and functions to increase the velocity of the liquid andtocreate` xa high suction at the throat of, the Venturi-tube rI3. l

Eductors have heretofore been designed wherein thecontour of thepressure water inlet did not Vform a direct continuation of the contourof the conical nozzle.` This arrangement of the operating mechanisminterfered with the ow andipro- `duced turbulence and otherwiseinterfered with xthe eicient operation of the instrument.

.The improved eductor herein disclosed avoids 'the-objectionableconstruction of the features of the prior art and comprisesow passageswhich y-are stream-lined in the direction of flow, and so that sharpangles and indentations which would `cause turbulence are avoided andywhich permits flow therethrough with the least possible resistiUnderoperating conditions, after an` installation is made it isdesirable to be able tochange the sizeof the nozzle without dismantlingthe entire piping arrangement. This substitution of nozzles may be dueto varying pressure inlet conditions that may be different from thosecontemplated .before the installation was made. 'Inlet .positions arealways speciiied, as side in- .let perpendicularto the directionof flowof the suction and ldischargejinlet parallel toi suction and discharge,but in a vertical. position forming a returnI` L, or parallel to suctionand discharge and linz the'same direction as `suction anddischarge,;as.we1l as the inlet .being in any angular relationwith theaxis of ilow and suction.

Itfisreadily seen yfrom the drawing thatithis unit will answer anyl of;the above specified conditionsanolI thisflexibility in design oftenmakes possible the completion ofawship, naval vessel,etc.,Without'waitingl yfor `the partiCuIar-speCied eductor unit or uni Y'The design of eductor herein disclosed, where the nozzle `forms adirectcontinuation of the con.

The separabley ...gated hollow body for driven water, said hollow of theinvention as deilned by the appended jclaims.

I claim: 1. In a stream-lined water eductor, an elonbody having anopening in its lower face and a cylindricalmetering or mixing chamber ofcircular cross-section for drive and driven water at its upper` portion,said mixing chamber being of uniform cross-section and being dened byupper andlower metering planes, a curved elbowyshaped pressure waterinlet-having an opening in its upper face, a conical nozzle-fordrivewater under pressure mounted in said opening, the outlet edge of saidnozzle being of substantially knife-edge thickness to permit merging ofsaid driveand driven streams of water without turbuleneesaid nozzlepassing freely' through said lower face opening in said hollow body, theupper elevation of said nozzle being positioned consid- Verablyabove thelargest cross-section of said lhollow body, releasable means forsecuring said innerA contour of saidnozzle being positioned so `astoforma direct continuation of the contour o f said .curved elbow-shapedinlet, and substantially without loss of energy dueto shock in passingthrough said mixing chamber whereby turbulence l1s avoided and the fullpressure of the drive water is maintained up to the point of entrance tolsaid nozzleand without loss of Venergy through said nozzle. i

2.V In l,a stream-lined water eductor, an elongated hollow bodyfiordriven water,.said hollow body having an opening in its lower face and acylindricalrmetering or mixing chamber of circular cross-section fordrive and driven water at its upper portion, said mixing chamber beingof` uniform cross-section and being dened by upper and lower meteringplanes, a curved elbowsnapedipressure water inlet having anv opening 1nits upper face, a conical nozzle for drive water underpressure mountedin saidopening, the out- .let 'edgepofpsaid nozzle being of'substantially y is avoided and the `full pressure of the drive water ismaintained up to the point of entrance ing below the lower wail of saidhollow body, the 10 `mixing chamber.

inner contour of said nozzle being positioned so as to form a directcontinuation of the contour of said elbow-shaped inlet. wherebyturbulence to said nozzle and substantially Without loss of energy dueto shock in passing through said PHILIP BERMAN, i l

